CVE-2024-11680
CVE-2024-11680 is a security flaw in ProjectSend. Attackers can get into ProjectSend without a valid password. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 3 Dec 2024.[1]
ProjectSend is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Fixed in version r1720.
Description
CISA calls it an improper authentication in ProjectSend ProjectSend. In its words: “ProjectSend contains an improper authentication vulnerability that allows a remote, unauthenticated attacker to enable unauthorized modification of the application's configuration via crafted HTTP requests to options.php. Successful exploitation allows attackers to create accounts, upload webshells, and embed malicious JavaScript.”[1]
The CVE record adds: “ProjectSend versions prior to r1720 are affected by an improper authentication vulnerability. Remote, unauthenticated attackers can exploit this flaw by sending crafted HTTP requests to options.php, enabling unauthorized modification of the application's configuration. Successful exploitation allows attackers to create accounts, upload webshells, and embed malicious JavaScript.”[2]
The underlying weakness is improper authentication (CWE-287), in MITRE’s list of common software weaknesses.
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record lists these fixed versions: in each line, everything before the version shown is affected.[2]
| Product | Fixed in |
|---|---|
| ProjectSend | r1720 |
| projectsend | r1720 |
Most families won’t have ProjectSend; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 3 Dec 2024, 7 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 24 Dec 2024 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 92%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
ProjectSend has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.”[1]
- Check whether you use it.ProjectSend is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed (fixed in version r1720), or not in use. CISA gave US government agencies until 24 Dec 2024 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 92%.[4] |
See also
Other improper authentication flaws
- CVE-2026-105133, AhsayCBS: improper authentication ·
- CVE-2026-42018, JFrog Artifactory: improper authentication ·
- CVE-2026-82329, JFrog Artifactory: improper authentication ·
- CVE-2026-59822, BerriAI LiteLLM: improper authentication ·
- CVE-2023-49105, ownCloud: improper authentication ·
Added the same day
- CVE-2024-11667, Zyxel Multiple Firewalls: path traversal ·
- CVE-2023-45727, North Grid Proself: improper restriction of XML external entity (XXE) reference ·
References
- ^ Cybersecurity and Infrastructure Security Agency. “ProjectSend Improper Authentication Vulnerability”. Known Exploited Vulnerabilities Catalog, added 3 Dec 2024.
- ^ National Institute of Standards and Technology. “CVE-2024-11680 Detail”. National Vulnerability Database, published 26 Nov 2024.
- ^ ProjectSend. Advisories and fixes: synacktiv.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.918, percentile 99.8, 31 Oct 2026.
- CVE Program. “CVE-2024-11680”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.